MPI_ITHACA
Submitting C MPI Programs to Virginia Tech's ITHACA Cluster

MPI_ITHACA is a directory of C programs which illustrate the use of PBS scripts on Virginia Tech's ITHACA cluster, in order to submit and run C programs that use MPI, the Message Passing Interface.

For C programs, the appropriate compiler is mpicc.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Related Data and Programs:

MPI C programs which illustrate the use of the MPI application program interface for carrying out parallel computations in a distributed memory environment.

MPI_INTRODUCTION is a one page introduction to MPI.

MPI_MORE_INFO contains a list of references, web sites, examples and tutorials on MPI.

MPI_STUBS is a C library which contains "stub" versions of MPI routines, allowing a user to compile, load, and possibly run an MPI program on a serial machine.

MPI_ITHACA is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version.

OPEN_MP C programs which illustrate the use of the OpenMP application program interface for carrying out parallel computations in a shared memory environment.

Reference:

1. William Gropp, Ewing Lusk, Anthony Skjellum,
   Using MPI: Portable Parallel Programming with the Message-Passing Interface,
   Second Edition,
   MIT Press, 1999,
   ISBN: 0262571323,
   LC: QA76.642.G76.

Examples and Tests:

BUFFON_LAPLACE demonstrates how parallel Monte Carlo processes can set up distinct random number streams.

• buffon_laplace.c, the source code;
• buffon_laplace.sh, a PBS command file to compile and run the program.
• buffon_laplace_output.txt, the output file;

HELLO simply prints out "Hello, world!" from each MPI process.

• hello.c, the source code;
• hello.sh, a PBS command file to compile and run the program.
• hello_output.txt, the output file;

INTERVALS estimates an integral by dividing an interval into subintervals, and having the servant processes estimate the integral over each subinterval.

• intervals.c, the source code;
• intervals.sh, a PBS command file to compile and run the program.
• intervals_output.txt, the output file;

MATVEC multiplies a matrix times a vector.

• matvec.c, the source code;
• matvec.sh, a PBS command file to compile and run the program.
• matvec_output.txt, the output file;

MONTE_CARLO computes PI by the Monte Carlo method, testing whether random points in the unit square are in the unit circle.

• monte_carlo.c, the source code;
• monte_carlo.sh, a PBS command file to compile and run the program.
• monte_carlo_output.txt, the output file;

QUADRATURE estimates an integral.

• quadrature.c, the source code;
• quadrature.sh, a PBS command file to compile and run the program.
• quadrature_output.txt, the output file;

SEARCH searches a vector for occurrences of a particular value.

• search.c, the source code;
• search.sh, a PBS command file to compile and run the program.
• search_output.txt, the output file;

You can go up one level to the C source codes.